Send cluster messages from a Message queue with only one socket. Ack and keep
Alive Handling is supported. Fast Queue can limit queue size and consume all messages at queue at one block.
Limit the queue lock contention under high load!

With autoConnect=false at ReplicationTransmitter, you can disconnect the
sender and all messages are queued. Only use this for small maintaince
isuses!

waitForAck=true, means that receiver ack the transfer

after one minute idle time, or number of request (100) the connection is
reconnected with next request. Change this for production use!

default ackTimeout is 15 sec: this is very low for big all session
replication messages after restart a node